Because of its shape, my kettle roaster confines heat, so that it roasts coffee rather quickly. First crack occurred 9 minutes after the start of roasting. It was hard for me to control the heat properly, and I ended up finishing roasting 13 minutes after the start of roasting.
I can't help thinking that the milk can roaster is the very best invention of Nakagawa-san, although he denies that. I want to have a roaster that can roast 300 g of coffee beans evenly, so I have a feeling that if I make a roaster with a can measuring 18-20 cm in diameter, it will be an ideal roaster for me.
私のやかん焙煎機は、その形状のため、熱がこもり、焙煎を早めにしてしまいます。１（いち）はぜは焙煎開始後９分で始まりました。熱を適切にコントロールするのが難しく、結局、焙煎開始後13分で焙煎を終了しました。
ミルク缶焙煎機は中川さんの最大の発明だと思わざるを得ません（中川さん自身は否定しますが）。私はコーヒー豆を300 g均一に焙煎できる焙煎機が欲しいので、直径18～20 cmの缶を使って焙煎機を作れば、私には理想的な焙煎機になるのではないかと感じます。

I tried the Brazilian coffee first. I brewed it with the Matsuya method.

まずはブラジルを試しました。松屋式で淹れました。

Very good indeed! In fact, I'm not sure if I can find a coffee house that can serve coffee this good!
ホントにとても美味しかったです。こんなに美味しいコーヒーを出せる喫茶店を見つけられるか分かりません。

December 1, 2013

Yesterday (Nov. 30), I almost tried to roast 300 g of green coffee beans in this 18 cm diameter sieve.

昨日（11/30）は、この直径18 cmのざるで生豆（きまめ、なままめ）を300 g焙煎しようと思いました。

I thought of ways to attach a wooden handle to the sieve and wrap aluminum foil around the sieve. I was unable to find good ways, so I decided to go to the second hand store again, hoping to find other cheap items suitable for coffee roasting. I bought this 19 cm diameter kettle for 380 yen.

This year, major conbini chains have started to offer drip coffee at moderate prices (100 and 180 yen at 7-11 and Lawson, respectively). I've been interested to know how good their coffees would be. Both coffees were much worse than I had expected, especially the 7-11 one.

I wanted to dark roast them so that they would be suitable for iced coffee (coffee jelly, to be more precise), but probably due to the heat capacity of the portable burner, the beans wouldn't get darker. After all, I roasted them for about 12 minutes. The weight loss was only 10 g.

November 28, 2013

I was in no mood for making another attempt with the alumite pot, and I decided to roast the remaining 255 g of coffee beans in my milk can roaster.

アルマイトの鍋で挑戦する気にもならず、ミルク缶焙煎機で残りの豆255 gを焙煎することにしました。

I succeeded in roasting this amount of coffee beans properly.

この量のコーヒー豆をちゃんと焙煎できました。

In the garage, where I roast coffee beans, there are persimmons hanging from ropes near the window.

コーヒーを焙煎しているガレージでは、窓の近くで柿がひもからぶら下がっています。

Some have already been eaten by my son.

幾つかはもう息子が食べました。

These are the equipment and tools that I use to roast coffee.

私がコーヒー焙煎に使う機材です。

Conclusions:

My two attempts to roast coffee beans (200 g and 300 g) in an alumite pot have ended in failure. I have a feeling that I should search for a large can with a diameter of, say, 15-18 cm, make a roaster with it, and try to roast up to 300 g of coffee beans. (I have a feeling that 500 g will be too much for a pot, pan, wok, kettle, and so on.)

I gave up the attempt, and transferred half the contents to my milk can roaster to roast them. It took me another 5 minutes or so to roast them fully. Then, I roasted the other half, which also took me 5 minutes or so (if I remember correctly).